Q: How to I fix my Mac startup drive

cydget wrote:

 

1. In the future(soon) I plan to triple boot my mac with the addition of linux, can I follow an online guide or is my harddrive now set up weirdly and not able to install linux according to a regular tutorial.

If you triple boot and use a Hybrid MBR, it is unsupported and can cause problems. If you have a Mac after Late 2013 which supports Windows installed via EFI, the Hybrid MBR restriction of 4 entries and 2TB limit goes away. Your hard drive is now setup as a standard BC drive. I suggest you back up OS X and Windows to separate external drive as a baseline for future restore. I would not recommend a triple-boot with Hybrid MBR, but it can be done.

2. If I mark this as solved does it stop people from commenting on it. I dont want to cause any trouble for the other guy on this post.

The thread does not 'close'. Any one can comment on it at any time as long as it is available on Apple Discussions.

I did all as you write and after reboot from USB OS X now present condition of GPT (p) is bellow.

Then I tried to unplug USB OS X an try to boot by pressing "option key / alt" and showing this.

now not showing Windows partition also. and can't load Windows 8.1 from boot.

I tried also boot from mac its showing...

So now what next sir ?

Let us first recover your OSX. Boot your Mac and hold the Alt Key. Once you see Internet Recovery, select it and re-install OSX only on the OSX partition and make sure you do not erase the OSX partition. If you do you will lose all your data. Once you verify OSX booting, then your Windows can be recovered.

sir I have Yosemite 10.10 OS X bootable USB for installation. Can I use this instead of Internet Recovery? otherwise it will take time for installation via Internet about 1 Week. cause in here Internet speed is very low for download....

Waiting for reply sir....

Yes, you can use that as long you can ensure that the OSX partition is not erased.

01. I boot from Yosemite 10.10 Bootable flash drive, but does not show any mac SSD Partition.

02. Then When Installation screen come and want to Select Mac Drive for Installation, There is no Mac OS X Drive show where I can Reinstall my OS X.

03. This Picture is in Yosemite 10.10 Bootable flash drive Disk Utilities.

04. This Picture is from, where I installed Yosemite 10.10 OS X in a External Flash Drive there have (Recovery HD 10.10) I booted from there and Open Disk Utilities.

05. This Picture is boot from External Yosemite 10.10 OS X, there is showing now BOOTCAMP (WINDOWS PARTITION) and I can Access file.

06. And This picture is in Terminal " sudo gdisk /dev/disk0 " .  '  p '

Sir I am giving full details to you but still I can't fix my problem yet.....

What is the size of your internal disk? Do you recall before the problems started, if your disk was a CoreStorage volume of a simple HFS+ volume?

Gdisk may have to be used to make it AF00 instead of AF05. It shows up as 750GB on the first page.

700GB internal disk. I don't understand about ' recall ' sir.

you can see my past few picture there have details about internal disk.

now how can I get mac partition for reinstall OS X?

This

Mahadis-MacBook-Pro:~ Mahadi_Hassan_Razib$ diskutil list

/dev/disk0

   #:                       TYPE NAME                    SIZE       IDENTIFIER

   0:     FDisk_partition_scheme                        *751.3 GB   disk0

   1:                Windows_LDM                         521.3 GB   disk0s1

   2:                Windows_LDM                         230.0 GB   disk0s2

   3:                Windows_LDM                         1.6 MB     disk0s3

but GPT output shows 699GB. This two numbers should match. Is there more than one drive in your Mac?

Here I goto About This Mac and > Storage ...

Hello sir,,, from Last 7 days I am suffering with this problem....

so Please forgive me and tell me how can I format my Entire 751GB internal storage and erase entire Disk and install fresh OS X. No Need to recovery my Data.

Please tell me how can I Formate Entire Disk and Install Max OS X in my 751GB SSD.

If that is what you want and do not want to save any of your data, can you post the output of

sudo gpt -vv -r show /dev/disk0

This command should work now, since there is no CRC errors shown by Gdisk. Once I see the output, I can give you the commands to erase it and reinstall OS X.